Improvement in steam-generators for heating buildings



2 Sheets--Sheet1.

F. T. CUMMINGS.

, Steam-Generators for Heating Buildings. No.149,105.

Patented March 31, 1874.

2 Sheeis--Sheet2,

F. T. CUMMINGS.

Steam-Generators for Heating Buildings. N0,]4 9,i05, Patented March 31,1874.

I M iii" ll ii ii UNITED STATES PATENT OFFICE.

FREDRI'OK T. CUMMINGS, or warnnrown, MASSACHUSETTS.

IMPROVEMENT IN STEAM-GENERATQRS FOR HEATING BUILDINGS.

Specification forming part of Letters Patent No. 149,105, dated March 31, 1874; application filed March 11, 1874.

, tion, reference being had to the accompanying drawings making part of this specification, in which- I Figure 1 is a perspective view of a steamgenerator constructed in accordance with my invention, one side being removed to show the interior construction. Fig. 2 is a vertical longitudinal section through the center of the same. Fig; 3 is a vertical transverse section on the line a a of Fig. 2. Fig. 4 is an elevation of a portion of one side of the apparatus.

'My invention has for its object to produce a cheap, simple, and compact boiler for heating purposes, which will generate steam rapidly, and with a very small consumption of fuel; and consist-s in a series of water-tubes, connected together and with a steam-chamber above, in combination with division-plates so arranged between the tubes as to form a circuitous flue, by which the flame and other heated products of combustion are retarded in their passage from the fire-box to the chimney, and retained in contact with the watertubes,which are thereby quickly heated, so as to generate steam in a rapid and economical manner.

To enable others skilled in the art to understand and use my'invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents the firebox, a the grate-bars, and B the bridge-wall, above which, and within the brick walls 0, are supported a number of tubes, D, for containing water, a space, 6, being left between the end of each tube and the adjacent wall 0. Three of these tubes, D, are united together by short connecting-pipes b, and three series of tubes are arranged side by side at a short distance apart. The upper tube D of each series is connected by a vertical pipe, 0, with achamber, E, placed above the brick-work to receive the dry steam, the steam, as it is generated, rising into this chamber, from which it passes by pipes 61 to the radiators in various parts of the building to be heated. The waste steam and water produced by con densation are returned by pipes c to a chamber, G, connected with one of the lower tubes D by pipes f. The tubes 1) are supplied with fresh water through a pipe, g, which enters one of the middle tubes, the several series of tubes being connected together by small pipes h, which allow the water to circulate freely, and rise or fall equally in all of the tubes. The lower tubes D are placed close to the bridge-wall B, so as to leave only a flue-space, and bring them as near to the fire as possible. 2' are division-plates, which are placed between the tubes D, and so arranged as to form a circuitous flue or passage, is. through which the flame and other heated products of combustion pass to the chimney H, as indicated by the arrows, being thus retarded in their passage and brought into cou tact with the entire length of every tube D, imparting a great amount of heat thereto, which would be wasted if it were allowed to pass directly from the firebox to the chimney.

By this construction steam is generated rapidly with very little fuel, and a great saving is thus effected.

The division- Hates 'i are made in sections to allow of expansion and contraction, and are intended to be set into the brick-work to enable them to serve as supports for the tubes D, which rest on blocks m, placed between the plates and the under sides of the tubes.

Instead of a series of three tubes D, placed one above the other, as Shown, and connected together by pipes b, a series of two tubes only, or more than three, may be used, if preferred; and, if it is desired to make the apparatus wider, the number of series of tubes may be increased.

a is the steam-gage, p the water-gage, and q the regulator, the lever 7 of which is intended to be connected with the damper r, by which ranged between the tubes D to form a circuitmeans the fire can be automatically regulated, ous flue 7c, the whole constructed and operas desired. ztting substantially as set forth.

hat I claim as my invention, and desire itness my hand this 5th day of March, to secure by Letters Patent, is- A. D. 1874.

The Within-described steam-generatoiycon- FREDRIOK T. CUMMINGS. sisting of the tubes I), connected together and In presence of with the stemn-chznnber E, in combination 1?. E. TESOHEMAOIIER,

with the fire-box A and division-plates 5,211 1 I NWV. STEARNS. 

